​Circulating water vacuum pump is a kind of vacuum pump that uses circulating water as the working fluid and uses the 
negative pressure generated by the jet to spray. The ultimate vacuum it can obtain is 3000-6000Pa. The pump has the characteristics of small size, light weight, beautiful appearance, etc. It provides vacuum conditions for evaporation, distillation, crystallization, drying, sublimation, vacuum filtration and other processes. It is especially suitable for laboratories and industrial small tests in universities, research institutes, chemical industry, pharmaceuticals, biochemistry, food, pesticides, agricultural engineering, biological engineering and other industries.